NORTHWEST NATURAL GAS CO
424B3, 1999-01-14
NATURAL GAS DISTRIBUTION
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                                            Filed Pursuant to Rule 424(b)(3)
                                            Registration No. 333-64777




          PROSPECTUS
          ----------
                                     $123,000,000
                            NORTHWEST NATURAL GAS COMPANY
                         SECURED MEDIUM-TERM NOTES, SERIES B
                           (SERIES OF FIRST MORTGAGE BONDS)
                                         AND
                        UNSECURED MEDIUM-TERM NOTES, SERIES B
                 Due from Nine Months to 30 Years from Date of Issue


                                 --------------------

               Northwest Natural Gas Company ("Company") may offer from
          time to time up to $123,000,000 aggregate principal amount of its
          debt securities ("Medium-Term Notes"), consisting of its First
          Mortgage Bonds, designated Secured Medium-Term Notes, Series B
          ("Secured Notes"), and its Unsecured Medium-Term Notes, Series B
          ("Unsecured Notes").  The principal amounts, interest rates,
          issue prices and agents' commissions, original issue and maturity
          dates, redemption provisions, if any, and other material terms of
          the Medium-Term Notes will be established by the Company from
          time to time and will be set forth in supplements hereto
          ("Pricing Supplements").  The Medium-Term Notes will have
          maturities from nine months to 30 years from their respective
          dates of issue.  Unless otherwise specified in the Pricing
          Supplement relating to any Medium-Term Note, interest on such
          Medium-Term Note will accrue from its date of issue and will be
          payable semi-annually in arrears on each June 1 and December 1,
          and at maturity.  The Medium-Term Notes will not be subject to
          redemption prior to their stated maturity unless otherwise
          specified in the applicable Pricing Supplement.
               The Medium-Term Notes will be initially registered in the
          name of CEDE & Co. as registered owner and nominee for The
          Depository Trust Company, New York, New York ("DTC").  DTC will
          act as a securities depositary for the Medium-Term Notes of each
          issue.  Sales of Medium-Term Notes will be made only in book-
          entry form in denominations of $1,000 or any amount in excess
          thereof that is an integral multiple of $1,000 and, except under
          the limited circumstances described herein, beneficial owners of
          interests in the Medium-Term Notes will not receive certificates
          representing their interests in the Medium-Term Notes.  Payments
          of principal, premium, if any, and interest will be made through
          DTC and its Participants and disbursements of such payments to
          purchasers will be the responsibility of such Participants.
               For further information with respect to the Medium-Term
          Notes, see "Book-Entry System", "Description of the Secured
          Notes", and "Description of the Unsecured Notes" herein and in
          the applicable Pricing Supplement.


                                 --------------------

            THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE
              SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
              COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION
                 OR ANY STATE SECURITIES COMMISSION PASSED UPON THE 
                   ACCURACY OR ADEQUACY OF THIS PROSPECTUS OR ANY 
                    SUPPLEMENT HERETO.  ANY REPRESENTATION TO THE
                           CONTRARY IS A CRIMINAL OFFENSE.

     ========================================================================
                            PRICE TO           AGENTS'          PROCEEDS TO
                            PUBLIC(1)     COMMISSIONS(2)(3)   COMPANY(2)(4)
     ------------------------------------------------------------------------
     Per Note  . . . .        100%         .125%-.750%       99.875%-99.250%
     ------------------------------------------------------------------------
     Total . . . . . .   $123,000,000   $153,750-$922,500   $122,846,250-
                                                               $122,077,500
     ========================================================================
          (1)  Unless otherwise specified in the applicable Pricing
               Supplement, Medium-Term Notes will be issued at 100% of
               their principal amount.
          (2)  The Company will pay commissions to any agents engaged by
               the Company ("Agents"), including Merrill Lynch & Co.,
               Merrill Lynch, Pierce, Fenner & Smith Incorporated and
               PaineWebber Incorporated, in the form of discounts, ranging
               from .125% to .750% of the principal amount of any Medium-
               Term Note, depending upon maturity, and may sell Medium-Term
               Notes to any Agent, as principal.  Unless otherwise
               indicated in the applicable Pricing Supplement, a Medium-
               Term Note sold to an Agent, as principal, will be purchased
               by such Agent at a price equal to 100% of the principal
               amount thereof less a percentage equal to the commission
               applicable to an agency sale of a Medium-Term Note of
               identical maturity, and may be resold by such Agent to
               investors and other purchasers at varying prices related to
               prevailing market prices at the time of resale as determined
               by such Agent, or, if so agreed, at a fixed public offering
               price.  No commission will be payable on any sales made
               directly by the Company.
          (3)  The Company has agreed to indemnify the Agents against
               certain liabilities under the Securities Act of 1933, as
               amended ("Securities Act").
          (4)  Assuming Medium-Term Notes are issued at 100% of their
               principal amount and before deducting expenses payable by
               the Company estimated at $225,000, including reimbursement
               of certain expenses of the Agents.

                                 --------------------
               The Medium-Term Notes are being offered on a continuing
          basis by the Company through the Agents, which have agreed to use
          their best efforts to solicit purchases of the Medium-Term Notes. 
          Medium-Term Notes may also be sold to any Agent, as principal,
          for resale to investors and other purchasers at varying prices
          related to prevailing market prices at the time of resale, as
          determined by such Agent, or, if so agreed, at a fixed public
          offering price.  The Company reserves the right to sell Medium-
          Term Notes directly to investors on its own behalf.  The Medium-
          Term Notes will not be listed on any securities exchange, and
          there can be no assurance that the Medium-Term Notes offered by
          this Prospectus will be sold or that there will be a secondary
          market for the Medium-Term Notes.  The Company reserves the right
          to withdraw, cancel or modify the offer made hereby without
          notice.  The Company or any Agent may reject, in whole or in
          part, any offer to purchase Medium-Term Notes.  See "Plan of
          Distribution".
                              --------------------
          Merrill Lynch & Co.                      PaineWebber Incorporated
                              --------------------

                 The date of this Prospectus is January 14, 1999


     <PAGE>


          IN CONNECTION WITH CERTAIN TYPES OF OFFERS AND SALES OF MEDIUM-
          TERM NOTES, CERTAIN PERSONS PARTICIPATING IN THE OFFERING OF SUCH
          MEDIUM-TERM NOTES MAY ENGAGE IN TRANSACTIONS THAT STABILIZE OR
          MAINTAIN OR OTHERWISE AFFECT THE PRICE OF SUCH MEDIUM-TERM NOTES. 
          SUCH TRANSACTIONS MAY INCLUDE BIDS OR PURCHASES FOR THE PURPOSE
          OF PEGGING, FIXING OR MAINTAINING THE PRICE OF THE MEDIUM-TERM
          NOTES, THE PURCHASE OF MEDIUM-TERM NOTES TO COVER SYNDICATE SHORT
          POSITIONS AND THE IMPOSITION OF PENALTY BIDS.  FOR A DESCRIPTION
          OF THESE ACTIVITIES, SEE "PLAN OF DISTRIBUTION".

                                 --------------------


                              FORWARD-LOOKING STATEMENTS

               This document does, and the documents incorporated herein by
          reference may, contain forward-looking statements within the
          meaning of Section 27A of the Securities Act and Section 21E of
          the Securities Exchange Act of 1934, as amended ("Exchange Act"). 
          Although the Company believes these statements are based on
          reasonable assumptions, no assurance can be given that actual
          results will not differ from those in the forward-looking
          statements contained herein and in the incorporated documents. 
          The forward-looking statements contained herein and in the
          incorporated documents may be affected by various uncertainties. 
          For a discussion of factors which may affect forward-looking
          statements contained herein and in the incorporated documents,
          see the Company's most recent Annual Report on Form 10-K and its
          most recent Quarterly Report on Form 10-Q.


                                AVAILABLE INFORMATION

               The Company is subject to the informational requirements of
          the Exchange Act, and, in accordance therewith, files reports and
          other information with the Securities and Exchange Commission
          ("Commission").  Reports, proxy statements and other information
          filed by the Company can be inspected and copied at the public
          reference facilities of the Commission, Room 1024, Judiciary
          Plaza, 450 Fifth Street, N.W., Washington, D.C. 20549, as well as
          at the following regional offices: Seven World Trade Center,
          Suite 1300, New York, New York 10048, and 500 West Madison
          Street, Suite 1400, Chicago, Illinois 60661.  Copies of such
          material can be obtained from the Public Reference Section of the
          Commission at 450 Fifth Street, N.W., Washington, D.C. 20549, at
          prescribed rates.  The Commission maintains a Web site
          (http://www.sec.gov) that contains reports, proxy statements and
          other information filed electronically by the Company.


                   INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

               There are hereby incorporated by reference in this
          Prospectus the following documents heretofore filed with the
          Securities and Exchange Commission:

               (1)  The Company's Annual Report on Form 10-K for the year
                    ended December 31, 1997.

               (2)  The Company's Quarterly Reports on Form 10-Q for the
                    quarters ended March 31, June 30 and September 30,
                    1998.

               (3)  The Company's Current Reports on Form 8-K dated
                    February 27 and December 23, 1998.

               All documents filed by the Company pursuant to Section
          13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of
          this Prospectus and prior to the termination of this offering
          shall be deemed to be incorporated by reference into this
          Prospectus; provided, however, that the documents enumerated
          above or subsequently filed by the Company pursuant to Section 13
          of the Exchange Act prior to the filing with the Commission of
          the Company's most recent Annual Report on Form 10-K ("Latest
          Annual Report") shall not be incorporated by reference in this
          Prospectus or be a part hereof from and after the filing of the
          Latest Annual Report.  Any statement contained in a document
          incorporated or deemed to be incorporated by reference herein
          shall be deemed to be modified or superseded, for purposes of
          this Prospectus, to the extent that a statement contained herein
          or in any other subsequently filed document which also is or is
          deemed to be incorporated by reference herein modifies or
          supersedes such statement.  Any statement so modified or
          superseded shall not be deemed, except as so modified or
          superseded, to constitute a part of this Prospectus.

               The Company hereby undertakes to provide, without charge, to
          each person to whom a copy of this Prospectus shall have been
          delivered, upon written or oral request of such person, a copy of
          any or all of the documents which have been incorporated in this
          Prospectus by reference, other than exhibits to such documents,
          unless such exhibits shall have been specifically incorporated by
          reference into such documents.  Requests for such copies should
          be directed to C.J. Rue, Secretary, Northwest Natural Gas
          Company, One Pacific Square, 220 N.W. Second Avenue, Portland,
          Oregon 97209, telephone 503-226-4211.


                                      2
     <PAGE>


                                     THE COMPANY

               The Company is principally engaged in the distribution of
          natural gas to customers in western Oregon and southwestern
          Washington, including the Portland metropolitan area.  The
          Company and its predecessors have supplied gas service to the
          public since 1859.  The Company's executive offices are located
          at One Pacific Square, 220 N.W. Second Avenue, Portland, Oregon
          97209.  Its telephone number is 503-226-4211.


                        USE OF PROCEEDS AND FINANCING PROGRAM

               The net proceeds to be received by the Company from the sale
          of the Medium-Term Notes will be added to the general funds of
          the Company and used for corporate purposes, primarily to fund,
          in part, the Company's ongoing utility construction program.

               The Company expects its utility construction expenditures in
          1999 to aggregate $110 million, and in the five-year period,
          1999-2003, to aggregate between $500 million and $550 million.

               It is estimated that 50% of the funds required for utility
          purposes during the 1999-2003 period will be internally generated
          and that the balance, as well as substantially all of the funds
          required for the refunding of maturing and higher-cost debt, will
          be raised through the sale of equity and debt securities,
          including the Medium-Term Notes, in such amounts and at such
          times as the Company's cash requirements and market conditions
          shall determine.  Approximately $10 million of debt securities
          will mature in each of 1999 and 2000.


                          RATIO OF EARNINGS TO FIXED CHARGES

               The ratios of earnings to fixed charges, calculated
          according to the rules set forth under the Securities Act, for
          the following twelve-month periods were:

                                 TWELVE MONTHS ENDED
           ---------------------------------------------------------------

           SEPTEMBER 30,                    DECEMBER 31,
           -------------    ----------------------------------------------
                1998        1997      1996      1995      1994      1993
                ----        ----      ----      ----      ----      ----

                2.63        2.99      3.53      3.15      3.08      3.22

               Earnings consist of net income to which has been added taxes
          on income and fixed charges.  Fixed charges consist of interest
          on all indebtedness, amortization of debt expense and discount or
          premium, and the estimated interest portion of rentals charged to
          income.


                                  BOOK-ENTRY SYSTEM

               DTC will act as securities depositary for the Medium-Term
          Notes of each issue. Except under the circumstances described
          below, the Medium-Term Notes will be issued in the form of one or
          more fully registered notes that will be deposited with, or on
          behalf of, DTC or such other depositary as may be subsequently
          designated ("Depositary"), and registered in the name of CEDE &
          Co. (DTC's partnership nominee), or such other Depositary or its
          nominee as may be subsequently designated. 

               So long as the Depositary, or its nominee, is the registered
          owner of the Medium-Term Notes, such Depositary or such nominee,
          as the case may be, will be considered the owner of such
          Medium-Term Notes for all purposes under the Mortgage or the
          Indenture (each as defined below), as the case may be, including
          notices and voting.  Payments of principal of, and premium, if
          any, and interest on, the Medium-Term Notes will be made to the
          Depositary or its nominee, as the case may be, as the registered
          owner of such Medium-Term Notes.  Except as set forth below,
          owners of beneficial interests in Medium-Term Notes will not be
          entitled to have any individual Medium-Term Notes registered in
          their names, will not receive or be entitled to receive physical
          delivery of any such Medium-Term Notes and will not be considered
          the owners of Medium-Term Notes under the Mortgage or the
          Indenture.  Accordingly, each person holding a beneficial
          interest in a Medium-Term Note must rely on the procedures of the
          Depositary and, if such person is not a Direct Participant (as


                                      3
     <PAGE>


          hereinafter defined), on procedures of the Direct Participant
          through which such person holds its interest, to exercise any of
          the rights of the registered owner of such Medium-Term Note.

               If the Depositary is at any time unwilling or unable to
          continue as depositary and a successor depositary is not
          appointed by the Company, individual registered Medium-Term Notes
          will be issued in exchange for the Medium-Term Notes held by the
          Depositary. In addition, the Company, at any time and in its sole
          discretion, may determine not to have the Medium-Term Notes held
          by the Depositary and, in such event, individual registered
          Medium-Term Notes will be issued in exchange for the Medium-Term
          Notes held by the Depositary.  In any such instance, an owner of
          a beneficial interest in the Medium-Term Notes will be entitled
          to physical delivery of individual Medium-Term Notes equal in
          principal amount to such beneficial interest and to have such
          Medium-Term Notes registered in its name. Individual Medium-Term
          Notes so issued will be issued as registered Medium-Term Notes in
          denominations of $1,000 or any amount in excess thereof that is
          an integral multiple of $1,000.

               The following is based solely on information furnished by
          DTC: 

               DTC is a limited-purpose trust company organized under the
          New York Banking Law, a "banking organization" within the meaning
          of the New York Banking Law, a member of the Federal Reserve
          System, a "clearing corporation" within the meaning of the New
          York Uniform Commercial Code, and  a "clearing agency" registered
          pursuant to the provisions of Section 17A of the Exchange Act. 
          DTC holds securities that its participants ("Participants")
          deposit with DTC.  DTC also facilitates the settlement among
          Participants of securities transactions, such as transfers and
          pledges, in deposited securities through electronic computerized
          book-entry changes in Participants' accounts, thereby eliminating
          the need for physical movement of securities certificates. 
          Direct Participants include securities brokers and dealers,
          banks, trust companies, clearing corporations and certain other
          organizations ("Direct Participants").  DTC is owned by a number
          of its Direct Participants and by The New York Stock Exchange,
          Inc., the American Stock Exchange, Inc., and the National
          Association of Securities Dealers, Inc.  Access to the DTC system
          is also available to others such as securities brokers and
          dealers, banks, and trust companies that clear through or
          maintain a custodial relationship with a Direct Participant,
          either directly or indirectly ("Indirect Participants").  The
          rules applicable to DTC and its Participants are on file with the
          Commission.

               Purchases of the Medium-Term Notes under the DTC system must
          be made by or through Direct Participants, which will receive a
          credit for the Medium-Term Notes on DTC's records.  The ownership
          interest of each actual purchaser of each Medium-Term Note
          ("Beneficial Owner") is in turn to be recorded on the Direct and
          Indirect Participants' records.  Beneficial Owners will not
          receive written confirmation from DTC of their purchase, but
          Beneficial Owners are expected to receive written confirmation
          providing details of the transaction, as well as periodic
          statements of their holdings, from the Direct or Indirect
          Participant through which the Beneficial Owner entered into the
          transaction.  Transfers of ownership interests in the Medium-Term
          Notes are to be accomplished by entries made on the books of
          Participants acting on behalf of Beneficial Owners.  Beneficial
          Owners will not receive certificates representing their ownership
          interests in the Medium-Term Notes, except in the event that use
          of the book-entry system for the Medium-Term Notes is
          discontinued.

               To facilitate subsequent transfers, all Medium-Term Notes
          deposited by Participants with DTC are registered in the name of
          CEDE & Co.  The deposit of Medium-Term Notes with DTC and their
          registration in the name of CEDE & Co. effect no change in
          beneficial ownership.  DTC has no knowledge of the actual
          Beneficial Owners of the Medium-Term Notes; DTC's records reflect
          only the identity of the Direct Participants to whose accounts
          such Medium-Term Notes are credited, which may or may not be the
          Beneficial Owners.  The Participants will remain responsible for
          keeping account of their holdings on behalf of their customers.

               Conveyance of notices and other communications by DTC to
          Direct Participants, by Direct Participants to Indirect
          Participants, and by Direct Participants and Indirect
          Participants to Beneficial Owners will be governed by
          arrangements among them, subject to any statutory or regulatory
          requirements as may be in effect from time to time. 

               If the Medium-Term Notes of any issue are redeemable prior
          to the maturity date, redemption notices shall be sent to CEDE &
          Co.  If less than all of the Medium-Term Notes of any issue are
          being redeemed, DTC's practice is to determine by lot the amount
          of the interest of each Direct Participant in such issue to be
          redeemed. 

               Neither DTC nor CEDE & Co. will consent or vote with respect
          to the Medium-Term Notes.  Under its usual procedures, DTC mails
          an Omnibus Proxy to the Company as soon as possible after the
          record date. The Omnibus Proxy assigns CEDE & Co.'s consenting or
          voting rights to those Direct Participants to whose accounts the
          Medium-Term Notes are credited on the record date (identified in
          a listing attached to the Omnibus Proxy).


                                      4
     <PAGE>


               Principal and interest payments on the Medium-Term Notes
          will be made to DTC. DTC's practice is to credit Direct
          Participants' accounts on the date on which interest is payable
          in accordance with their respective holdings shown on DTC's
          records, unless DTC has reason to believe that it will not
          receive payment on such payment date. Payments by Participants to
          Beneficial Owners will be governed by standing instructions and
          customary practices, as is the case with securities held for the
          accounts of customers in bearer form or registered in "street
          name", and will be the responsibility of such Participant and not
          of DTC, the Mortgage Trustees (as defined below), the Indenture
          Trustee (as defined below) or the Company, subject to any
          statutory or regulatory requirements as may be in effect from
          time to time.  Payment of principal and interest to DTC is the
          responsibility of the Company and the Corporate Trustee (as
          defined below) or the Indenture Trustee, as the case may be. 
          Disbursement of such payments to Direct Participants shall be the
          responsibility of DTC, and disbursement of such payments to the
          Beneficial Owners shall be the responsibility of Direct and
          Indirect Participants.

               DTC may discontinue providing services as securities
          depositary with respect to the Medium-Term Notes at any time by
          giving reasonable notice to the Company, the Mortgage Trustees
          and the Indenture Trustee.                   

                              -------------------------

               None of the Company or the Mortgage Trustees or the
          Indenture Trustee will have any responsibility or liability for
          any aspect of the records relating to or payments made on account
          of beneficial interests in the Medium-Term Notes or for
          maintaining, supervising or reviewing any records relating to
          such beneficial interests.


                           DESCRIPTION OF THE SECURED NOTES

          GENERAL

               The Secured Notes, which comprise a series of the Company's
          First Mortgage Bonds ("Bonds"), are to be issued under the
          Company's Mortgage and Deed of Trust, dated as of July 1, 1946,
          to Bankers Trust Company ("Corporate Trustee") and R.G. Page
          (Stanley Burg, successor), as trustees (together, "Mortgage
          Trustees"), as supplemented by twenty supplemental indentures,
          all of which are collectively referred to as the "Mortgage". 

               The statements herein concerning the Secured Notes and the
          Mortgage are merely an outline and do not purport to be complete.
          They make use of terms defined in the Mortgage and are qualified
          in their entirety by express reference to the cited Sections and
          Articles. They may be changed with respect to any Secured Note by
          the applicable Pricing Supplement, which should be read in
          conjunction with this description.

               The Secured Notes will be offered on a continuing basis and
          each Secured Note will mature on such date, not less than nine
          months or more than 30 years from its date of issue, as selected
          by the purchaser and agreed to by the Company. 

               The Pricing Supplement relating to each Secured Note will
          set forth the principal amount, interest rate, interest payment
          dates, record dates, issue price and Agent's commission or
          discount, original issue and maturity dates, redemption or
          repayment provisions, if any, and other material terms of such
          Secured Note. 

          INTEREST

               Unless otherwise specified in the Pricing Supplement
          relating to any Secured Note, interest on such Secured Note will
          be payable semi-annually in arrears on June 1 and December 1 of
          each year and at maturity.

               Unless otherwise specified in the Pricing Supplement
          relating to any Secured Note, interest payable on any interest
          payment date for any Secured Note will be payable to the person
          in whose name such Secured Note is registered on the record date
          with respect to such interest payment date, which shall be the
          May 15 or November 15 (whether or not a business day), as the
          case may be, next preceding such interest payment date; provided
          that, (i) if the original issue date of any Secured Note is after
          a record date and before the corresponding interest payment date,
          such Secured Note shall bear interest from the original issue
          date, but payment of interest shall commence on the second
          interest payment date succeeding the original issue date, and
          (ii) interest payable on the maturity date will be payable to the
          person to whom the principal thereof shall be payable. 

               Unless otherwise indicated in the applicable Pricing
          Supplement, interest on the Secured Notes will be computed on the
          basis of a 360-day year consisting of twelve 30-day months.


                                      5
     <PAGE>


          FORM, EXCHANGE AND PAYMENT

                   The Secured Notes will be issued in fully registered
          form in denominations of $1,000 or any amount in excess thereof
          that is an integral multiple of $1,000. The Secured Notes will be
          exchangeable at the office of Bankers Trust Company in New York
          City, without charge other than taxes or other governmental
          charges incident thereto. Principal, premium, if any, and
          interest will be payable at such office. (See Twentieth
          Supplemental, Sec. 1.01.)  Notwithstanding the foregoing, for so
          long as the Secured Notes shall be held by the Depositary or its
          nominee, owners of beneficial interests in the Secured Notes will
          not be entitled to have any individual Secured Notes registered
          in their names, and transfers of beneficial interests and
          payments of principal, premium, if any, and interest will be made
          as described herein under "Book-Entry System". 

          REDEMPTION

               To the extent, if any, provided in the Pricing Supplement
          relating to any Secured Note, such Secured Note will be
          redeemable, on 30 days' notice, in whole or in part, at any time
          on or after the initial redemption date, if any, fixed at the
          time of sale and set forth in the applicable Pricing Supplement. 
          On or after the initial redemption date, such Secured Note will
          be redeemable in whole or in part, at the option of the Company
          at a redemption price determined in accordance with the following
          paragraph or as set forth in the related Pricing Supplement, plus
          accrued interest to the date fixed for redemption. 

               The redemption price for each Secured Note subject to
          redemption shall, for the twelve-month period commencing on the
          initial redemption date, be equal to a certain percentage of the
          principal amount of such Secured Note and thereafter, shall
          decline for the twelve-month period commencing on each
          anniversary of the initial redemption date by a percentage of
          principal amount ("Reduction Percentage") until the redemption
          price shall be 100% of the principal amount. The initial
          redemption date and price and any Reduction Percentage with
          respect to each Secured Note subject to redemption will be fixed
          at the time of sale and set forth in the applicable Pricing
          Supplement.

               If so specified in the Pricing Supplement relating to any
          Secured Note, the Company may not, prior to the redemption
          limitation date, if any, set forth in such Pricing Supplement,
          redeem such Secured Note as contemplated above as a part of, or
          in anticipation of, any refunding operation by the application,
          directly or indirectly, of moneys borrowed having an effective
          interest cost to the Company (calculated in accordance with
          generally accepted financial practice) of less than the effective
          interest cost to the Company (similarly calculated) of such
          Secured Note. 

               If, at the time the notice of redemption shall be given, the
          redemption money shall not be on deposit with the Corporate
          Trustee, the redemption may be made subject to the receipt of
          such money before the date fixed for redemption, and such notice
          shall be of no effect unless such money shall be so received. 

               Unless otherwise indicated in the applicable Pricing
          Supplement, the Secured Notes will not be subject to any sinking
          fund. 

          REPAYMENT AT OPTION OF HOLDER

               To the extent, if any, provided in the Pricing Supplement
          relating to any Secured Note, such Secured Note will be repayable
          by the Company at the option of the registered holder thereof on
          the date specified in such Pricing Supplement ("Repayment Date"),
          at a price equal to a percentage of the principal amount of such
          Secured Note specified in such Pricing Supplement ("Repayment
          Price"), plus accrued interest to the date of repayment.  For any
          Secured Note to be repaid, the Company must receive such Secured
          Note at its office or agency in the Borough of Manhattan, The
          City of New York (currently, the office of the Corporate
          Trustee), within the period ("Election Period") commencing at the
          opening of business and ending at the close of business on the
          dates specified in the Pricing Supplement relating to such
          Secured Note (provided that, if the last day of the Election
          Period shall not be a business day, the Election Period shall end
          at the close of business on the next succeeding business day),
          together with the form entitled "Option to Elect Repayment" on
          the reverse of, or otherwise accompanying, such Secured Note duly
          completed.  Any such election so received by the Company within
          such Election Period shall be irrevocable.  The repayment option
          may be exercised by the registered holder of a Secured Note for
          less than the entire principal amount of such Secured Note,
          provided that the principal amount to be repaid is equal to
          $1,000 or an integral multiple of $1,000.  All questions as to
          the validity, eligibility (including time of receipt) and
          acceptance of any Secured Note for repayment will be determined
          by the Corporate Trustee, whose determination will be final and
          binding.

               So long as the Depositary or the Depositary's nominee is the
          registered holder of the Secured Notes, the Depositary or such
          nominee will be the only entity that can exercise the repayment
          option, and repayment will be made in accordance with the


                                      6
     <PAGE>


          Depositary's repayment procedures in effect at the time.  See
          "Book-Entry System."  In order to ensure that the Depositary or
          its nominee will timely exercise a repayment option with respect
          to a particular beneficial interest in the Secured Notes, the
          Beneficial Owner of such interest must instruct the broker or
          other Direct or Indirect Participant through which it holds such
          interest to notify the Depositary of its election to exercise the
          repayment option.  In addition, the Beneficial Owner must effect
          delivery of such interest at the time such notice of election is
          given to the Depositary by causing the broker or other Direct or
          Indirect Participant through which it holds such interest to
          transfer such interest on the Depositary's records to the
          Corporate Trustee.  Different firms have different deadlines for
          accepting instructions from their customers and, accordingly,
          each Beneficial Owner should consult the broker or other Direct
          or Indirect Participant through which it holds an interest in the
          Secured Notes in order to ascertain the deadline by which such
          instruction must be given in order for timely notice to be
          delivered to the Depositary.

          PROVISIONS FOR MAINTENANCE OF PROPERTY

               While the Mortgage contains provisions for the maintenance
          of the Mortgaged and Pledged Property, the Mortgage does not
          permit redemption of Bonds pursuant to these provisions.

          SECURITY

               The Secured Notes together with all other Bonds now or
          hereafter issued under the Mortgage will be secured by the
          Mortgage, which constitutes a first mortgage lien on certain gas
          utility properties owned from time to time by the Company (except
          as stated below), subject to (a) leases of minor portions of the
          Company's property to others for uses which do not interfere with
          the Company's business, (b) leases of certain property of the
          Company not used in its gas utility business or the gas
          by-product business, (c) excepted encumbrances, and (d) minor
          defects and encumbrances customarily found in properties of like
          size and character which do not impair the use of such properties
          by the Company. There are excepted from the lien all cash and
          securities; certain equipment, apparatus, materials or supplies;
          aircraft, automobiles and other vehicles; receivables, contracts,
          leases and operating agreements; timber, minerals, mineral rights
          and royalties; and all natural gas and oil production property.

               The Mortgage contains provisions subjecting after-acquired
          property (subject to pre-existing liens) to the lien thereof,
          subject to limitations in the case of consolidation, merger or
          sale of substantially all of the Company's assets.  (See
          Mortgage, Art. XVI.)

               The Mortgage provides that the Mortgage Trustees shall have
          a lien upon the mortgaged property, prior to that of the Bonds,
          for the payment of their reasonable compensation and expenses and
          for indemnity against certain liabilities.  (See Mortgage, Sec.
          96).

          ISSUANCE OF ADDITIONAL BONDS

               Bonds may be issued from time to time on the basis of (1)
          60% of property additions, after adjustments to offset
          retirements (see "Modification of the Mortgage -- Issuance of
          Additional Bonds" below); (2) retirement of Bonds or qualified
          lien bonds; or (3) deposit of cash. With certain exceptions in
          the case of (2) above, the issuance of Bonds is subject to
          adjusted net earnings before income taxes for 12 consecutive
          months out of the preceding 15 months being at least twice the
          annual interest requirements on all Bonds at the time
          outstanding, including the additional issue, and all indebtedness
          of prior rank.

               Property additions generally include gas, electric, steam or
          hot water property or gas by-product property acquired after
          March 31, 1946, but may not include securities, airplanes,
          automobiles or other vehicles, or natural gas transmission lines
          or natural gas and oil production property.  As of October 31,
          1998, approximately $346 million of property additions (including
          $72 million of property additions previously certified as the
          basis for the issuance of $43 million of the Secured Notes) and
          $127 million of retired Bonds were available for use as the basis
          for the issuance of Bonds.  In November 1998, the Company issued
          $20 million of Secured Notes on the basis of approximately $33
          million of such property additions.

               The Mortgage contains certain restrictions upon the issuance
          of Bonds against property subject to liens.  

               The Secured Notes will be issued against property additions
          and retired Bonds.

               (See Mortgage, Secs. 4-7, 20-30 and 46, and Third
          Supplemental, Secs. 3 and 4.)


                                      7
     <PAGE>


          RELEASE AND SUBSTITUTION OF PROPERTY

               Property may be released against (1) deposit of cash or, to
          a limited extent, purchase money mortgages, (2) property
          additions, or (3) waiver of the right to issue Bonds without
          applying any earnings test. Cash so deposited and cash deposited
          against the issuance of additional bonds may be withdrawn upon
          the bases stated in (2) and (3) above.  When property released is
          not funded property, property additions used to effect the
          release may again, in certain cases, become available as credits
          under the Mortgage, and the waiver of the right to issue Bonds to
          effect the release may, in certain cases, cease to be effective
          as such a waiver. Similar provisions are in effect as to cash
          proceeds of such property. The Mortgage contains special
          provisions with respect to qualified lien bonds pledged and the
          disposition of moneys received on pledged prior lien bonds. (See
          Mortgage, Secs. 5, 31, 32, 37, 46 to 50, 59 to 61, 100 and 118.)

          SATISFACTION AND DISCHARGE OF MORTGAGE

               The lien of the Mortgage may be canceled and discharged
          whenever all indebtedness secured by the Mortgage has been paid. 
          Bonds, or any portion of the principal amount thereof, will,
          prior to the maturity thereof, be deemed to have been paid for
          purposes of satisfying the lien of the Mortgage and shall not be
          deemed to be outstanding for any other purpose of the Mortgage if
          there shall have been deposited with the Corporate Trustee either
          (i) moneys in the necessary amount or (ii) (a) direct obligations
          of the government of the United States of America or (b)
          obligations guaranteed by the government of the United States of
          America or (c) securities that are backed by obligations of the
          government of the United States of America as collateral under an
          arrangement by which the interest and principal payments on the
          collateral generally flow immediately through to the holder of
          the security, which in any case are not subject to redemption
          prior to maturity by anyone other than the holders, the principal
          of and the interest on which when due, and without any regard to
          reinvestment thereof, shall be sufficient to pay when due the
          principal of, premium, if any, and interest due and to become due
          on said Bonds or portions thereof on the redemption date or
          maturity date thereof, as the case may be.  (See Mortgage, Sec.
          106 and Thirteenth Supplemental, Sec. 3.02.)

          DEFAULTS AND NOTICE THEREOF

               Defaults are:  default in payment of principal, default for
          60 days in payment of interest or of installments of funds for
          retirement of Bonds; certain defaults with respect to qualified
          lien bonds; certain events in bankruptcy, insolvency or
          reorganization; and default for 90 days after notice in the case
          of a breach of any other covenant.  The Mortgage Trustees may
          withhold notice of default (except in payment of principal,
          interest or any fund for the retirement of Bonds) if they think
          it in the interest of the Bondholders.  (See Mortgage, Secs. 65
          and 66.)

               Holders of 25% of the Bonds may declare the principal and
          the interest due on default, but a majority may annul such
          declaration if such default has been cured.  No holder of Bonds
          may enforce the lien of the Mortgage without giving the Mortgage
          Trustees written notice of a default and unless holders of 25% of
          the Bonds have requested the Mortgage Trustees to act and offered
          them reasonable opportunity to act and the Mortgage Trustees have
          failed to act.  The Mortgage Trustees are not required to risk
          their funds or incur personal liability if there is reasonable
          ground for believing that the repayment is not reasonably
          assured.  Holders of a majority of the Bonds may direct the time,
          method and place of conducting any proceedings for any remedy
          available to the Mortgage Trustees, or exercising any trust or
          power conferred upon the Mortgage Trustees, but the Mortgage
          Trustees are not required to follow such direction if not
          sufficiently indemnified for expenditures.  (See Mortgage, Secs.
          67, 71, 80 and 94.)

          EVIDENCE TO BE FURNISHED TO THE MORTGAGE TRUSTEES

               Compliance with Mortgage provisions is evidenced by written
          statements of the Company's officers or persons selected by the
          Company.  In certain major matters the accountant, engineer,
          appraiser or other expert must be independent.  Various
          certificates and other papers, including an annual certificate
          with reference to compliance with the terms of the Mortgage and
          absence of defaults, are required to be filed annually and upon
          the occurrence of certain events.  (See Mortgage, Secs. 38-46.)

          MODIFICATION OF THE MORTGAGE

               The rights of the Bondholders may be modified with the
          consent of 70% of the Bonds and, if less than all series of Bonds
          are affected, the consent also of 70% of Bonds of each series
          affected.  The Company has the right, without any consent or
          other action by holders of any series of Bonds, to substitute
          66 % for 70%.  In general, no modification of the terms of
          payment of principal and interest, affecting the lien of the
          Mortgage or reducing the percentage required for modification
          (except as provided above) will be effective against any
          Bondholder without his consent.  (See Mortgage, Art. XIX and
          Ninth Supplemental, Sec.6.)


                                      8
     <PAGE>


               The Company has reserved the right to amend the Mortgage,
          without any consent or other action by holders of the Bonds of
          the Nineteenth Series or of Bonds of any subsequently created
          series (including the Secured Notes), in the following respects:

               Release and Substitution of Property

               To permit the release of property at the lesser of its cost
          or its fair value at the time that such property became funded
          property, rather than at its fair value at the time of its
          release; and to facilitate the release of unfunded property. 
          (See Mortgage, Secs. 3, 59 and 60 and Eighteenth Supplemental,
          Sec. 2.03.)

               Issuance of Additional Bonds

               To clarify that (i) for purposes of determining annual
          interest requirements, interest on Bonds or other indebtedness
          bearing interest at a variable interest rate shall be computed at
          the average of the interest rates borne by such Bonds or other
          indebtedness during the period of calculation or, if such Bonds
          or other indebtedness shall have been issued after such period or
          shall be the subject of pending applications, interest shall be
          computed at the initial rate borne upon issuance, and (ii) no
          extraordinary items shall be included in operating expenses or
          deducted from revenues or other income in calculating adjusted
          net earnings (See Mortgage, Sec. 7.); and to revise the basis for
          the issuance of additional Bonds from 60% of property additions,
          after adjustments to offset retirements, to 70%. (See Mortgage,
          Secs. 25, 26, 59 and 61 and Eighteenth Supplemental, Secs. 2.01
          and 2.02.)

          THE CORPORATE TRUSTEE

               Bankers Trust Company also serves as the Indenture Trustee
          under the Indenture under which the Unsecured Notes are issued. 


                          DESCRIPTION OF THE UNSECURED NOTES

              GENERAL

               The Unsecured Notes are to be issued under an Indenture,
          dated as of June 1, 1991 ("Indenture"), between the Company and
          Bankers Trust Company, as trustee ("Indenture Trustee").

               The statements herein concerning the Unsecured Notes and the
          Indenture are merely an outline and do not purport to be
          complete.  They make use of terms defined in the Indenture and
          are qualified in their entirety by express reference to the cited
          Sections and Articles. They may be changed with respect to any
          Unsecured Note by the applicable Pricing Supplement, which should
          be read in conjunction with this description.

               The Indenture provides that debt securities (including the
          Unsecured Notes and including both interest bearing and original
          issue discount securities) may be issued thereunder, without
          limitation as to aggregate principal amount. (See Indenture, Sec.
          301.)  All debt securities heretofore or hereafter issued under
          the Indenture (including the Unsecured Notes) are collectively
          referred to as the "Indenture Securities". The Indenture does not
          limit the amount of other debt, secured or unsecured, which may
          be issued by the Company. The Unsecured Notes will rank pari
          passu with all other unsecured and unsubordinated indebtedness of
          the Company. Substantially all of the gas plants, distribution
          systems and other materially important physical properties of the
          Company are subject to the lien of the Mortgage securing the
          Company's Bonds. (See "Description of the Secured Notes--
          Security" and "-- Issuance of Additional Bonds", above.) 

               The Unsecured Notes will be offered on a continuing basis,
          and each Unsecured Note will mature on such date, not less than
          nine months nor more than 30 years from its date of issue, as
          selected by the purchaser and agreed to by the Company.

               The Pricing Supplement relating to any Unsecured Note will
          set forth the principal amount, interest rate, interest payment
          dates, regular record dates, issue price and Agent's commission
          or discount, original issue and maturity dates, redemption or
          repayment provisions, if any, and other material terms of such
          Unsecured Note. 

          INTEREST

               Unless otherwise specified in the Pricing Supplement
          relating to any Unsecured Note, interest on such Unsecured Note
          will be payable semi-annually in arrears on June 1 and December 1
          of each year and at maturity.


                                      9
     <PAGE>


               Unless otherwise specified in the Pricing Supplement
          relating to any Unsecured Note, interest payable on any interest
          payment date for any Unsecured Note will be payable to the person
          in whose name such Unsecured Note is registered on the record
          date with respect to such interest payment date, which shall be
          the May 15 or November 15 (whether or not a business day), as the
          case may be, next preceding such interest payment date; provided
          that, (i) if the original issue date of any Unsecured Note is
          after a record date and before the corresponding interest payment
          date, such Unsecured Note will bear interest from the original
          issue date but payment of interest shall commence on the second
          interest payment date succeeding the original issue date, and
          (ii) interest payable on the maturity date will be payable to the
          person to whom the principal thereof shall be payable.

               Unless otherwise indicated in the applicable Pricing
          Supplement, interest on the Unsecured Notes will be computed on
          the basis of a 360-day year consisting of twelve 30-day months. 

          FORM, EXCHANGE AND PAYMENT

               The Unsecured Notes will be issued in fully registered form
          in denominations of $1,000 or any amount in excess thereof that
          is an integral multiple of $1,000. The Unsecured Notes will be
          exchangeable at the office of Bankers Trust Company in New York
          City, without charge other than taxes or other governmental
          charges incident thereto. Principal, premium, if any, and
          interest will be payable at such office. Notwithstanding the
          foregoing, for so long as the Unsecured Notes shall be held by
          the Depositary or its nominee, owners of beneficial interests in
          the Unsecured Notes will not be entitled to have any individual
          Unsecured Notes registered in their names, and transfers of
          beneficial interests and payments of principal, premium, if any,
          and interest will be made as described herein under "Book-Entry
          System". 

          REDEMPTION

               To the extent, if any, provided in the Pricing Supplement
          relating to any Unsecured Note, such Unsecured Note will be
          redeemable, on not less than 30 days' notice, in whole or in
          part, at any time on or after the initial redemption     date, if
          any, fixed at the time of sale and set forth in the applicable
          Pricing Supplement.  On or after the initial redemption date,
          such Unsecured Note will be redeemable in whole or in part, at
          the option of the Company, at a redemption price determined in
          accordance with the following paragraph or as set forth in the
          related Pricing Supplement, plus accrued interest to the date
          fixed for redemption.

               The redemption price for each Unsecured Note subject to
          redemption shall, for the twelve-month period commencing on the
          initial redemption date, be equal to a certain percentage of the
          principal amount of such Unsecured Note and, thereafter, shall
          decline for the twelve-month period commencing on each
          anniversary of the initial redemption date by a percentage of
          principal amount ("Reduction Percentage") until the redemption
          price shall be 100% of the principal amount. The initial
          redemption price and date and any Reduction Percentage with
          respect to each Unsecured Note subject to redemption will be
          fixed at the time of sale and set forth in the applicable Pricing
          Supplement.

               If so specified in the Pricing Supplement relating to any
          Unsecured Note, the Company may not, prior to the redemption
          limitation date, if any, set forth in such Pricing Supplement,
          redeem such Unsecured Note as contemplated above as a part of, or
          in anticipation of, any refunding operation by the application,
          directly or indirectly, of moneys borrowed having an effective
          interest cost to the Company (calculated in accordance with
          generally accepted financial practice) of less than the effective
          interest cost to the Company (similarly calculated) of such
          Unsecured Note. 

               If, at the time the notice of redemption shall be given, the
          redemption money shall not be on deposit with the Indenture
          Trustee, the redemption shall be made subject to the receipt of
          such money on or before the date fixed for redemption, and such
          notice shall be of no effect unless such money shall be so
          received. (See Indenture, Art. Four.)

               Unless otherwise indicated in the applicable Pricing
          Supplement, the Unsecured Notes will not be subject to any
          sinking fund.

          REPAYMENT AT OPTION OF HOLDER

               To the extent, if any, provided in the Pricing Supplement
          relating to any Unsecured Note, such Unsecured Note will be
          repayable by the Company at the option of the registered holder
          thereof on the date specified in such Pricing Supplement
          ("Repayment Date"), at a price equal to a percentage of the
          principal amount of such Unsecured Note specified in such Pricing
          Supplement ("Repayment Price"), plus accrued interest to the date
          of repayment.  For any Unsecured Note to be repaid, the Company
          must receive such Unsecured Note at its office or agency in the
          Borough of Manhattan, The City of New York (currently, the office
          of the Indenture Trustee), within the period ("Election Period")
          commencing at the opening of business and ending at the close of
          business on the dates specified in the Pricing Supplement


                                      10
     <PAGE>


          relating to such Unsecured Note (provided that, if the last day
          of the Election Period shall not be a business day, the Election
          Period shall end at the close of business on the next succeeding
          business day), together with the form entitled "Option to Elect
          Repayment" on the reverse of, or otherwise accompanying, such
          Unsecured Note duly completed.  Any such election so received by
          the Company within such Election Period shall be irrevocable. 
          The repayment option may be exercised by the registered holder of
          an Unsecured Note for less than the entire principal amount of
          such Unsecured Note, provided that the principal amount to be
          repaid is equal to $1,000 or an integral multiple of $1,000.  All
          questions as to the validity, eligibility (including time of
          receipt) and acceptance of any Unsecured Note for repayment will
          be determined by the Indenture Trustee, whose determination will
          be final and binding.

               So long as the Depositary or the Depositary's nominee is the
          registered holder of the Unsecured Notes, the Depositary or such
          nominee will be the only entity that can exercise the repayment
          option, and repayment will be made in accordance with the
          Depositary's repayment procedures in effect at the time.  See
          "Book-Entry System."  In order to ensure that the Depositary or
          its nominee will timely exercise a repayment option with respect
          to a particular beneficial interest in the Unsecured Notes, the
          Beneficial Owner of such interest must instruct the broker or
          other Direct or Indirect Participant through which it holds such
          interest to notify the Depositary of its election to exercise the
          repayment option.  In addition, the Beneficial Owner must effect
          delivery of such interest at the time such notice of election is
          given to the Depositary by causing the broker or other Direct or
          Indirect Participant through which it holds such interest to
          transfer such interest on the Depositary's records to the
          Indenture Trustee.  Different firms have different deadlines for
          accepting instructions from their customers and, accordingly,
          each Beneficial Owner should consult the broker or other Direct
          or Indirect Participant through which it holds an interest in the
          Unsecured Notes in order to ascertain the deadline by which such
          instruction must be given in order for timely notice to be
          delivered to the Depositary.

          DEFEASANCE

               The principal amount of any Unsecured Notes issued under the
          Indenture will be deemed to have been paid for purposes of the
          Indenture and the entire indebtedness of the Company in respect
          thereof will be deemed to have been satisfied and discharged, if
          there shall have been irrevocably deposited with the Indenture
          Trustee, in trust: (a) money in an amount which will be
          sufficient, or (b) in the case of a deposit made prior to the
          maturity of the Unsecured Notes, Government Obligations (as
          defined herein), which do not contain provisions permitting the
          redemption or other prepayment thereof at the option of the
          issuer thereof, the principal of and the interest on which when
          due, without any regard to reinvestment thereof, will provide
          moneys which, together with the money, if any, deposited with or
          held by the Indenture Trustee, will be sufficient, or (c) a
          combination of (a) and (b) which will be sufficient, to pay when
          due the principal of and premium, if any, and interest, if any,
          due and to become due on the Unsecured Notes that are
          outstanding.  For this purpose, Government Obligations include
          direct obligations of, or obligations unconditionally guaranteed
          by, the United States of America entitled to the benefit of the
          full faith and credit thereof and certificates, depositary
          receipts or other instruments which evidence a direct ownership
          interest in such obligations or in any specific interest or
          principal payments due in respect thereof.  (See Indenture, Secs.
          101, 701.)

               If the Company shall make any deposit of money and/or
          Government Obligations with respect to the Unsecured Notes, or
          any portion of the principal amount thereof, prior to the
          Maturity or redemption of such Unsecured Notes or such portion of
          the principal amount thereof, for the satisfaction or discharge
          of the indebtedness of the Company in respect to such Unsecured
          Notes or such portion thereof as contemplated by Section 701 of
          the Indenture, the Company shall deliver to the Indenture Trustee
          either (a) an instrument wherein the Company, notwithstanding
          such satisfaction and discharge, shall assume the obligation
          (which shall be absolute and unconditional) to irrevocably
          deposit with the Indenture Trustee such additional sums of money,
          if any, or additional Government Obligations, if any, or any
          combination thereof, at such time or times, as shall be
          necessary, together with the money and/or Government Obligations
          theretofore so deposited, to pay when due the principal of and
          premium, if any, and interest due and to become due on such
          Unsecured Notes or such portions thereof, all in accordance with
          and subject to the provisions of said Section 701; provided,
          however, that such instrument may state that the obligation of
          the Company to make additional deposits as aforesaid shall be
          subject to the delivery to the Company by the Indenture Trustee
          of a notice asserting the amount of such deficiency accompanied
          by an opinion of an independent public accountant of nationally
          recognized standing, selected by the Indenture Trustee, showing
          the calculation thereof, or (b) an opinion of Counsel to the
          effect that the Holders of such Unsecured Notes, or such portions
          of the principal amount thereof, will not recognize income, gain
          or loss for United States federal income tax purposes as a result
          of such satisfaction and discharge and will be subject to United
          States federal income tax on the same amounts, at the same times
          and in the same manner as if such satisfaction and discharge had
          not been effected.

               In the event that the Company shall elect to deliver to the
          Indenture Trustee an instrument as described in clause (a) of the
          preceding paragraph in connection with any such deposit of money
          and/or Government Obligations with the Indenture Trustee, under
          current applicable United States federal income tax regulations,
          the Holders of such Unsecured Notes, or such portions thereof,
          will not recognize income, gain or loss for United States federal


                                      11
     <PAGE>


          income tax purposes as a result of such satisfaction and
          discharge and will be subject to United States federal income tax
          on the same amounts, at the same times and in the same manner as
          if such deposit had not been effected.  There can be no assurance
          that such United States federal income tax regulations will not
          change such that, as a result of such deposit and delivery by the
          Company of such instrument, Holders may recognize income, gain or
          loss for United States federal income tax purposes and may not be
          subject to United States federal income tax on the same amounts,
          at the same times and in the same manner as if such deposit had
          not been effected.

          EVENTS OF DEFAULT AND NOTICE THEREOF

               Events of Default are: default for three Business Days in
          payment of principal; default for 60 days in payment of interest;
          certain events in bankruptcy, insolvency or reorganization;
          default for 90 days after notice in the case of a breach of any
          other covenant; and any other Event of Default specified with
          respect to the Indenture Securities of a particular series. No
          Event of Default with respect to a series of Indenture Securities
          necessarily constitutes an Event of Default with respect to the
          Indenture Securities of any other series. The Indenture Trustee
          may withhold notice of default (except in payment of principal,
          interest or any funds for the retirement of Indenture Securities)
          if it, in good faith, determines that withholding of such notice
          is in the interest of the Holders of the Indenture Securities.
          (See Indenture, Secs. 801 and 903.) 

               Either the Indenture Trustee or the Holders of not less than
          33% in principal amount (or such lesser amount as may be provided
          in the case of discount Indenture Securities) of the outstanding
          Indenture Securities of all defaulted series, considered as one
          class, may declare the principal and interest on such series due
          on default, but the Company may annul such default by effecting
          its cure and paying overdue interest and principal.  No Holder of
          Indenture Securities may enforce the Indenture without having
          given the Indenture Trustee written notice of default, and unless
          the Holders of a majority of the Indenture Securities of all
          defaulted series, considered as one class, shall have requested
          the Indenture Trustee to act and offered reasonable indemnity,
          and for 60 days the Indenture Trustee shall have failed to act. 
          But, each Holder has an absolute right to receive payment of
          principal and interest when due and to institute suit for the
          enforcement of such payment. The Indenture Trustee is not
          required to risk its funds or incur any financial liability if it
          shall have reasonable grounds for believing that repayment is not
          reasonably assured. The Holders of a majority of the Indenture
          Securities of all defaulted series, considered as one class, may
          direct the time, method and place of conducting any proceedings
          for any remedy available to the Indenture Trustee, or exercising
          any trust or power conferred on the Indenture Trustee, with
          respect to the Indenture Securities of such series, but the
          Indenture Trustee is not required to follow such direction if not
          sufficiently indemnified and the Indenture Trustee may take any
          other action it deems proper which is not inconsistent with such
          direction. (See Indenture, Secs. 802, 807, 808, 812 and 902.) 

          EVIDENCE TO BE FURNISHED TO THE INDENTURE TRUSTEE

               Compliance with Indenture provisions will be evidenced by
          written statements of the Company's officers. An annual
          certificate with reference to compliance with the covenants and
          conditions of the Indenture and the absence of defaults is
          required to be filed with the Indenture Trustee. (See Indenture,
          Sec.1004.) 

          MODIFICATION OF THE INDENTURE

               The rights of the Holders of the Indenture Securities may be
          modified with the consent of the Holders of a majority of the
          Indenture Securities of all series or Tranches, as defined below,
          affected, considered as one class. However, certain specified
          rights of the Holders of Indenture Securities may be modified
          without the consent of the Holders if such modification would not
          be deemed adversely to affect their interests in any material
          respect. In general, no modification of the terms of payment of
          principal and interest, no reduction of the percentage in
          principal amount of the Indenture Securities outstanding under
          such series required to consent to any supplemental indenture or
          waiver under the Indenture, no reduction of such percentage
          necessary for quorum and voting, and no modification of certain
          of the provisions in the Indenture relating to supplemental
          indentures, waivers of certain covenants and waivers of past
          defaults is effective against any Holder of Indenture Securities
          without his consent.  "Tranche" means a group of Indenture
          Securities which are of the same series and have identical terms
          except as to principal amount and/or date of issuance.  (See
          Indenture, Art. Twelve.)

          THE INDENTURE TRUSTEE

               Bankers Trust Company also serves as the Corporate Trustee
          under the Mortgage under which the Secured Notes are issued.


                                      12
     <PAGE>


                                 PLAN OF DISTRIBUTION

               The Medium-Term Notes are being offered on a continuing
          basis for sale by the Company through the Agents which have
          agreed to use their best efforts to solicit purchases of the
          Medium-Term Notes.  The initial Agents are Merrill Lynch & Co.,
          Merrill Lynch, Pierce, Fenner & Smith Incorporated and
          PaineWebber Incorporated.  Should the Company designate other
          persons to act as Agents, the names of such persons will be
          disclosed in a Pricing Supplement.  The Company will pay each
          Agent a commission which, depending on the maturity of the
          Medium-Term Notes, will range from .125% to .750% of the
          principal amount of any Medium-Term Note sold through such Agent. 
          The Company may also sell Medium-Term Notes to any Agent, as
          principal, at a discount from the principal amount thereof, and
          the Agent may later resell such Medium-Term Notes to investors
          and other purchasers at varying prices related to prevailing
          market prices at the time of resale as determined by such Agent
          or, if so agreed, at a fixed public offering price.  In the case
          of sales to any Agent as principal, such Agent may utilize a
          selling or dealer group in connection with resales.  An Agent may
          sell Medium-Term Notes it has purchased as principal to any
          dealer at a discount and, unless otherwise specified in the
          applicable Pricing Supplement, such discount allowed to any
          dealer will not be in excess of the discount to be received by
          such Agent from the Company.  After the initial public offering
          of Medium-Term Notes to be resold to investors and other
          purchasers, the public offering price (in the case of a fixed
          price public offering), concession and discount may be changed. 
          The Medium-Term Notes also may be sold by the Company directly to
          purchasers.  No commission will be payable to the Agents on
          Medium-Term Notes sold directly by the Company.

               The Company reserves the right to withdraw, cancel or modify
          the offer made hereby without notice and may reject, in whole or
          in part, offers to purchase Medium-Term Notes whether placed
          directly with the Company or through one of the Agents.  Each
          Agent will have the right, in its discretion reasonably
          exercised, to reject any offer to purchase Medium-Term Notes
          received by it, in whole or in part.

               Payment of the purchase price of the Medium-Term Notes will
          be required to be made in immediately available funds in New York
          City on the date of settlement.

               No Medium-Term Note will have an established trading market
          when issued.  The Medium-Term Notes will not be listed on any
          securities exchange.  Each of the Agents may from time to time
          purchase and sell Medium-Term Notes in the secondary market, but
          is not obligated to do so.  There can be no assurance that there
          will be a secondary market for the Medium-Term Notes or liquidity
          in the secondary market if one develops.  From time to time, each
          of the Agents may make a market in the Medium-Term Notes.

               The Agents may be deemed to be "underwriters" within the
          meaning of the Securities Act. The Company has agreed to
          indemnify each of the Agents against, or to make contributions
          relating to, certain liabilities, including liabilities under
          such Act.  The Company has agreed to reimburse each of the Agents
          for certain expenses.  Each of the Agents may engage in
          transactions with, or perform services for, the Company in the
          ordinary course of business.

               In connection with certain types of offers and sales of
          Medium-Term Notes, rules of the Securities and Exchange
          Commission permit the Agents to engage in certain transactions
          that stabilize the price of such Medium-Term Notes.  Such
          transactions consist of bids or purchases for the purpose of
          pegging, fixing or maintaining the price of the Medium-Term
          Notes.

               If the Agents create a short position in any Medium-Term
          Notes in connection with certain types of offers and sales, i.e.,
          if they sell more Medium-Term Notes than are set forth in the
          applicable Pricing Supplement, the Agents may reduce that short
          position by purchasing Medium-Term Notes in the open market.

               In connection with certain types of offers and sales, the
          Agents may also impose a penalty bid on certain Agents and
          selling group members.  This means that if the Agents purchase
          Medium-Term Notes in the open market to reduce the Agents' short
          position or to stabilize the price of the Medium-Term Notes, they
          may reclaim the amount of selling concession from the Agents and
          selling group members who sold these Medium-Term Notes as part of
          the offering.

               In general, purchases of a security for the purpose of
          stabilization or to reduce a short position could cause the price
          of the security to be higher than it might be in the absence of
          such purchases.  The imposition of a penalty bid might also have
          an effect on the price of a security to the extent that it were
          to discourage resales of the security.

               Neither the Company nor any Agent makes any representation
          or prediction as to the direction or magnitude of any effect that
          the transactions described above may have on the price of the
          Medium-Term Notes.  In addition, neither the Company nor any
          Agent makes any representation that the Agents will engage in
          such transactions or that such transactions, once commenced, will
          not be discontinued without notice.


                                      13
     <PAGE>


                                       EXPERTS

               The financial statements incorporated in this Prospectus by
          reference to the Company's Annual Report on Form 10-K for the
          year ended December 31, 1997 have been so incorporated in
          reliance on the report of PricewaterhouseCoopers LLP, independent
          accountants, given on the authority of said firm as experts in
          auditing and accounting.

               The financial statements as of and for the years ended
          December 31, 1995 and 1996 incorporated in this Prospectus by
          reference to the Latest Annual Report have been audited by
          Deloitte & Touche LLP, independent auditors, as stated in their
          report, which is incorporated herein by reference, and have been
          so incorporated in reliance upon the report of such firm given
          upon their authority as experts in accounting and auditing.

               The statements made as to matters of law and legal
          conclusions under "Description of the Secured Notes--Security"
          herein have been reviewed (a) insofar as Oregon law is concerned,
          by Mark S. Dodson, Esquire, General Counsel of the Company; and
          (b) insofar as Washington law is concerned, by Stoel Rives LLP,
          Portland, Oregon, and have been set forth herein in reliance upon
          the opinions of Mr. Dodson and such firm given upon their
          authority as experts.  The statements made as to matters of law
          and legal conclusions in the documents incorporated in this
          Prospectus by reference pertaining to titles to properties,
          franchises and other operating rights of the Company, regulations
          to which the Company is subject and any legal proceedings to
          which the Company is a party, insofar as Oregon law is concerned,
          have been reviewed by Mr. Dodson and such statements are included
          in such documents and herein in reliance upon the opinion of Mr.
          Dodson given upon his authority as an expert.  As of January 14,
          1999, Mr. Dodson owned 4,500 shares of the Company's common stock
          and had been granted options to purchase an additional 5,000
          shares.


                                       LEGALITY

               The legality of the Medium-Term Notes will be passed upon
          for the Company by Mr. Dodson and by Messrs. Thelen Reid & Priest
          LLP, New York, New York, and for the agents by Messrs. Simpson
          Thacher & Bartlett, New York, New York.  Messrs. Thelen Reid &
          Priest LLP and Messrs. Simpson Thacher & Bartlett may rely upon
          the opinion of Mr. Dodson as to certain legal matters arising
          under Oregon law and Mr. Dodson, Messrs. Thelen Reid & Priest LLP
          and Messrs. Simpson Thacher & Bartlett may rely upon the opinion
          of Stoel Rives LLP as to certain legal matters arising under
          Washington law.  However, all matters pertaining to titles, the
          lien and enforceability of the Mortgage and franchises, will be
          passed upon only by Mr. Dodson, who may rely on the opinion of
          Stoel Rives LLP as to certain legal matters arising under
          Washington law.


                                      14
     <PAGE>

          =================================================================

          NO DEALER, SALESMAN OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO
          GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATIONS NOT CONTAINED
          IN THIS PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION OR
          REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED
          BY THE COMPANY. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER OF
          ANY SECURITIES OTHER THAN THOSE TO WHICH IT RELATES OR AN OFFER
          TO SELL, OR A SOLICITATION OF AN OFFER TO BUY, TO ANY PERSON IN
          ANY JURISDICTION WHERE SUCH AN OFFER OR SOLICITATION WOULD BE
          UNLAWFUL.  NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE
          MADE HEREUNDER SHALL, UNDER ANY CIRCUMSTANCES, CREATE ANY
          IMPLICATION THAT THE INFORMATION CONTAINED HEREIN IS CORRECT AS
          OF ANY TIME SUBSEQUENT TO THE DATE HEREOF.


                                  TABLE OF CONTENTS


          Forward-Looking Statements  . . . . . . . . . . . . . . . . .   2

          Available Information . . . . . . . . . . . . . . . . . . . .   2

          Incorporation of Certain Documents By Reference . . . . . . .   2

          The Company . . . . . . . . . . . . . . . . . . . . . . . . .   3

          Use of Proceeds and Financing Program . . . . . . . . . . . .   3

          Ratio of Earnings to Fixed Charges  . . . . . . . . . . . . .   3

          Book-Entry System . . . . . . . . . . . . . . . . . . . . . .   3

          Description of the Secured Notes  . . . . . . . . . . . . . .   5

          Description of the Unsecured Notes  . . . . . . . . . . . . .   9

          Plan of Distribution  . . . . . . . . . . . . . . . . . . . .  13

          Experts . . . . . . . . . . . . . . . . . . . . . . . . . . .  14

          Legality  . . . . . . . . . . . . . . . . . . . . . . . . . .  14



          =================================================================



          =================================================================




                                     $123,000,000


                                      NORTHWEST
                                 NATURAL GAS COMPANY



                              SECURED MEDIUM-TERM NOTES,
                                       SERIES B
                           (SERIES OF FIRST MORTGAGE BONDS)
                                         AND
                             UNSECURED MEDIUM-TERM NOTES,
                                       SERIES B

                           Due from Nine Months to 30 Years
                                  from Date of Issue



                                ----------------------

                                 P R O S P E C T U S

                                ----------------------



                                 MERRILL LYNCH & CO.

                               PAINEWEBBER INCORPORATED




                                   January 14, 1999




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